A recently published study on chronic traumatic encephalopathy (CTE) found traces of the degenerative brain disease not only in former NFL players, but in college and high school football players as well (The Journal of the American Medical Association, NY Times, ESPN). Eleven-player football enrollment declined by approximately 23K players from the 2015-16 season to the 2016-17 season. Outcome will be determined using data provided by the National Federation of State High School Associations (NFHS) for the 2017-18 season. _{Confused? Check our FAQ or ask us for help.}

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This question closed as "Between 1,030,000 and 1,040,000, inclusive" with an end date of 24 August 2018. According to the NFHS 1,038,179 students participated in eleven-player football in the 2017/18 season. (NFHS) _{See our FAQ to learn about how we resolve questions and how scores are calculated.}